Hi all,
I’m having an issue with my 44Net tunnel. It works beautifully incoming and almost as
good outgoing. For some reason, while on a 44Net IP’ed computer, I can’t reach
yahoo.com.
> All other locations I’ve tried work well and off the 44Net,
yahoo.com is reachable.
That kind of problems is usually caused by over-active network admins that block all ICMP
and thus kill PMTU discovery.
You can work around it by doing "TCP MSS clamping" at your end.
E.g. when you have a MikroTik router:
/ip firewall mangle
add action=change-mss chain=forward new-mss=clamp-to-pmtu passthrough=yes \
protocol=tcp tcp-flags=syn
Rob